Answer:
a or b
Explanation:
because those are the most likely to be true
now it gives you two options so i thinks it might be B but you could choose A you got two options choose wisely
<u>Answer:</u> The molality of magnesium chloride is 1.58 m
<u>Explanation:</u>
To calculate the molality of solution, we use the equation:

Where,
= Given mass of solute (magnesium chloride) = 75.0
= Molar mass of solute (magnesium chloride) = 95.21 g/mol
= Mass of solvent = 500.0 g
Putting values in above equation, we get:

Hence, the molality of magnesium chloride is 1.58 m
Answer:
3.9%
Explanation:
Exact melting point = 123°C
Measured melting point = 128°C
% error; |measured - exact|/exact × 100
% error = |123 -128|/128 × 100
%error = 3.9%
Percentage error in temperature measurement = 3.9 %